I have a strange problem with my Al 15" 1.5 gHz Powerbook G4 that is baffling me. Here's a run down of what happened... The drive crashed a few days ago. I ordered a new 160GB drive from iFixit. Drive arrived, I installed it today. I put in the OSX 10.5 DVD and did a system profiler: everything was OK! I used disk utility and erased the disk, formatting it with MacOS Extended (Journaled)... And then it happened--OSX won't install! It gets anywhere between 60% and 100% done installing and gives an error reporting "MEDIA CORRUPTED INSTALLATION FAILED" It checks the DVD before installation and never has a problem. I tried older OS's but the laptop will freeze or ignore those DVDs/CDs. OSX Leopard's DVD still works and reports the system/laptop/new drive are all wonderful.... Is this just a problem with the OSX disk?? Did something awful possibly happen during the drive installation? Any help? Anyone experience this before?